fix log path and java warnings

src/main/java/com/commafeed/frontend/pages/BasePage.java

@@ -9,6 +9,7 @@ import com.commafeed.frontend.components.auth.Role;
 import de.agilecoders.wicket.Bootstrap;
 
 @AuthorizeInstantiation(Role.USER)
+@SuppressWarnings("serial")
 public abstract class BasePage extends WebPage {
 
 	@Override

src/main/java/com/commafeed/frontend/pages/feed/FeedViewPage.java

@@ -25,6 +25,7 @@ import com.google.common.base.Predicate;
 import com.google.common.collect.Collections2;
 import com.google.common.collect.Lists;
 
+@SuppressWarnings("serial")
 public class FeedViewPage extends BasePage {
 
 	@Inject

src/main/java/com/commafeed/frontend/pages/home/HomePage.java

@@ -2,6 +2,7 @@ package com.commafeed.frontend.pages.home;
 
 import com.commafeed.frontend.pages.BasePage;
 
+@SuppressWarnings("serial")
 public class HomePage extends BasePage {
 
 }